George w



(No Model.)

G. W. BEYER.

MOLD.

No. 447,555. Patented Maln, 1891. jy, ly. fe; @M

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INVENTH orye/M yer 'Mmm //J ATTORNEY Uivrrn STATES GEORGE IV. BEYER, OF BROOKLYN, ASSIGNOR TO HIRAM W. HARRIS,

ATENT rines.

NE\V YORK, N. Y.

MOLD.

SPECIFICATION forming part of Letters Patent No. 447,555., dated. March 3, 1891. Application filed October 22, 1890. Serial No. 368,948. (No model.)

To aZZ whom, it may concern: n

Be it known that I, GEORGE `W. BEYER, of Brooklyn, Kings county, and State of New York, have invented a certain new and useful Improvement in Molds, of which the following is a specification.

llly improvement relates particularly to molds employed for shaping plastic material.

In the accompanying drawings, Figures l and 2 are face views of opposite plates of the mold. Figs. 3 and 4 are face views of two other plates which are used in connection with the plates illustrated by Figs. 1 and 2. Fig. 5 is a transverse section with all the plates fitted together. Figs. 6 and 7 are face views of the plates of a finishing-mold.

Similar letters of reference designate corresponding parts in all the figures.

The plates A and B are in the present instance counterparts, although in forming some articles which are to have opposite surfaces of different shapes these plates would differ. As here shown, each' of these plates has a central annular cavity a, a circular cutting or defining edge a extending around the outer circumference of the cavity a and bounding the same, and aWaste-cavity a2, arranged outside of the cutting or defining edge a. This Waste-cavity CL2 is here shown as of annular form; but it may be of any other shape. It is obvious thata number of cavities a and cutting or defining edges o. may be formed at intervals in the same plates, so that a number of articles may be molded together, and where this is the case the waste-cavity a2 Will be much more extensive, and may be shaped differently at the outer edge, so as to enable a strip of plastic material to be spread over a part of the cavities c and cutting or defining edges a and operated upon by them simultaneously. At the centers of the plates are circular' holes a3, in which hubs extending from plates C and D may be accommodated. At the inner edge of the cavities a I have shown rings a4. These are not absolutely necessary, but are desirable for reasons which will hereinafter appear. These rings a4 project at the inner edge of the cavities ain the same manner that the cutting or defining edges a project, but not necessarily to so great an extent. Y They will preferably be made of steel and are quite thin or sharp.

The plates themselves may advantageously be made of brass.

The plates O D have flat faces, but are provided at the center and opposite the holes cri of the plates A B with cylindrical hubs c, which are of a size to fit tightly within the holes ai; or within the rings at. These hubs are preferably made separately from the plates and attached thereto by means of screws c. The faces of the hubs may bc of any suitable shape, and may be plain or engraved to produce different couformations of the plastic materialpresented to them. They may be readily shaped or engraved even right up to the circumference. lVhen made separately from the plates CD, additional facility is afforded for shaping or ornamenting them. Their detachable connection with the plates C D is also advantageous, because it enables the user of the mold to substitutehubs of one kind for those of another kind.

I have shown one of the hubs as having a letter delineated upon it. This delineation will be made by sinking the linesinto the bub below its top surface.

The plate A is provided with holes which receive pins c2, extending from the face of the plate C, and it is also provided with holes which receive pins c3, extending from the plate C. The plate B is provided with holes for receiving pins cl, extending from the face of the plate D, and it and the plate D are also provided With holes which receive the pins c2 of the plate C. The pins serve to secure a proper register of the plates.

lVhen it is desired to use my mold, the plate A is placed upon the plate O and plastic material is placed opposite the cavity a and hole a3 of the plates A B. In the hole a3 plastic material of a color different from that in the cavity a may be placed. Obviously a single plate having an operative face corresponding to the faces of the two plates A C would be an equivalent of them. The plates B D are afterward placed above the plastic material and pressed down upon it. Thus the two masses of plastic material will be forced together, so as to be firmly united and both will be shaped. The rings a4 will prevent the plastic material of the two colors from joining on an irregular line at theirsurfaces and compel them to unite in a circular line. Of course there will be grooves or circular indentations in the finished articles when taken from these plates. lreterably springs Will be used between the plates to facilitate their separation. I have shown springs s, consisting of india-rubber, fitted into cavities in certain of the plates and bearxo ing against adjacent plates. `Afterward the pieces of plastic material are subjected to plain molds E F, and in this Way the grooves will be removed and the surfaces of the articles made true and polished. These molds E I5 F, it will be seen, have cylindric cavities e,

cutting or deiinin g edges c around these cavities, and waste-cavities c2 outside of the eutting or defining edges. One of these plates has pins e:s entering holes in the opposite plate 2o to cause a proper register of the two plates, and one of the plates has springs e4, which willbear against the opposite plate and facilitate the sepa 'ation ot' the two plates.

The incid-plates may be heated in the usual or any suitable manner prior to being used.

Instead of placingr two dili'eientl\f coloi'ed plastic materials between the plates A B, a plastic material of uniform color may be introduced, and then sheets of plastic material 3o or of any other material--such, forinstance, as paper-may be laid Within the holes a, so as to be forced into the mass of plastic material when the plates are pressed together. Then this is to be done, the rings a4 may be dispensed with, although they will still be useful for centering the piece of material to be attached to the plastic material.

Then the faces of the hubsare ornamented bysinking lines into them, ridges or raised lines will of course be formed on the plastic material. These ridges may be colored differently from the plastic material on which they are formed if coloring material is inserted in the lines sunk into the faces of the hubs. The ridges formed by the lines sunk in the faces of the hubs will of course be flattened out by the finishing-molds, but the coloring will remain.

Obviously it will be usually preferable to place both the top plates B D separately above the plastic material, but they may be applied together.

That I claim as my invention, and desire to secure by Letters Patent, is-

l. In a mold, the combination of plates having shaping-cavities and central openings, and other plates arranged outside the firstmentioned plates and provided with hubs extending into the central openings thereof", substantially as specified.

2. In a mold, the combination of plates having shaping'cavities and central openings and rings projecting upward from the circumference or edge of such openings, and other plates arranged outside the first-mentioned plates` and provided with hubs extending into thc central openings thereof, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

GEORGE W. llE'YICR. lVitnesses:

DANIEL G. J osEPH, AUGUSTUS J. Triennio. 

